I feel confused what should I do?

Basically there’s a girl I like in my school. Most of our chats are about school but it seemed like there was something more. She was sending me stickers with hearts and etc. Checking on me to see if I was alright, sharing a lot of personal info without me even thinking to ask her, I think I even caught her staring at me a few times, but now it seems like she is ignoring me, she isn’t really smiling when she sees me and I don’t know. Is she afraid or she isn’t interested in me at all.
I feel confused what should I do?
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